﻿// 
//    Copyright 2010 The JaernCloud Project
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
// 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using System.IO;

namespace JaernCloud.Web.Controllers {

    /// <summary>
    /// Model binder which converts an incoming string parameter from a POST to a JSONString.
    /// </summary>
    public class JSONModelBinder : IModelBinder {
        
        public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) {
            if (!controllerContext.HttpContext.Request.ContentType.StartsWith("application/json", StringComparison.OrdinalIgnoreCase)) {
                // not JSON request
                return null;
            }

            var request = controllerContext.HttpContext.Request;
            string incomingData = new StreamReader(request.InputStream).ReadToEnd();

            if (String.IsNullOrEmpty(incomingData)) {
                // no JSON data
                return null;
            }

            return new JSONString(incomingData, bindingContext);

        }
    }


}
